Gce Model Questions Vol1 2023 Chemistry Question 13
Practice objective / multiple choice question 13 from the 2023 Gce Model Questions Vol1 Chemistry examination.
A pure substance X boils at \(350\) K under a pressure of \(1\) atm and at \(365\) K under \(2\) atm. Assuming the liquid‑vapour coexistence line is linear between these points, use the Clapeyron equation (\(\frac{dP}{dT}=\frac{\Delta H_{vap}}{T\Delta V}\)) and the ideal‑gas approximation for the vapour (\(\Delta V\approx \frac{RT}{P}\)) to estimate the enthalpy of vapourisation \(\Delta H_{vap}\) of X. Give your answer in kJ·mol\(^{-1}\) (to two significant figures).
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About This Question
This is Gce Model Questions Vol1 2023 Chemistry Question 13. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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